Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Mavericks surfForecast / CAL – San Mateo / USA
48hr Weather and Surf, issued 3 pm Friday 12 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Mavericks surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mavericks sea temperature is
13.1° C
(Which is normal for this time of year)How big are the waves at Mavericks today?
The current surf forecast for Mavericks at 7PM is: 1.2m 13s primary swell from a West direction and 0.2m 13s secondary swell from a South-southwest direction (forecast issued at 03:00pm December 12). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | - | - |
| Afternoon (12 Dec) | 4.5ft (1.3m) | 13s |
| Evening (12 Dec) | 4ft (1.2m) | 13s |
Table - waves today at Mavericks. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 725 | 591 | 498 | 490 | 402 | 309 | 294 | 232 | 183 | 171 | 166 | 132 | 139 | 103 | 101 | 90 | 61 | 59 | 82 | 75 | 71 | 68 | 65 | 58 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | glass | glass | off | glass | off | cross- off | cross- off | glass | glass | glass | cross- off | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:54PM 1.13 | 5:42AM 1.64 | 6:23PM 1.08 | 6:18AM 1.68 | 7:43PM 1.10 | 6:51AM 1.71 | ||||||||||||||||||
Low Tide / height (m) | 11:31AM 0.57 | 10:55PM 0.42 | 12:32PM 0.39 | 11:45PM 0.59 | 1:22PM 0.22 | 12:34AM 0.73 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:15 | - | - | - | - | - | - | - | 7:16 | - | - | - | - | - | - | - | 7:16 |
| Sunset | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - |
 | |  | | | | | | | | | | | | | | |  | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 15 | 15 | 14 | 14 | 13 | 13 | 15 | 17 | 17 | 14 | 15 | 14 | 14 | 13 | 15 | 18 | 18 | 17 | 15 | 15 | 15 | 15 | 16 |
| Feels °C (?) | 9 | 11 | 11 | 10 | 10 | 9 | 9 | 12 | 15 | 15 | 12 | 11 | 12 | 10 | 10 | 12 | 16 | 16 | 14 | 12 | 12 | 12 | 11 | 12 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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